pull box, handhole?
- Thread starter anbm
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MY first thought is a Quazite box:
http://www.hubbellpowersystems.com/about/quazite/
To digress a moment. I'm curious as to your conductor arrangement.
Sounds like a derating nightmare with the 2" conduit.
http://www.hubbellpowersystems.com/about/quazite/
To digress a moment. I'm curious as to your conductor arrangement.
Sounds like a derating nightmare with the 2" conduit.
shamsdebout
Senior Member
- Location
- Macon,GA
Same manufacturer I was thinking of. Quazite will have what you need.
Why is it? (20) max. 20Amp/120V circuits output, will this hurt derating of (2) 2" conduits?
(each will contain have 10-20Amp/120V circuits)
iMuse97
Senior Member
- Location
- Chicagoland
Derate them by 50% with over nine CCCs. You don't want to overheat the whole business and have an angry customer. See 310.15 (B)(2)(a). Lists what you shall [ie. must] do if you put that many conductors in a conduit.
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iMuse97
Senior Member
- Location
- Chicagoland
At the same time, if this is the same project you mentioned in the earlier post re: Christmas lighting, I am wondering if you're the one who will be installing the Christmas lights? If so, you would be able to supervise the load distribution. If not, would it make sense to undersize the breakers to more closely approximate the derated ampacity of the conductors?
BTW, I'm on a kick lately regarding overloaded small conductors because I've run into many of them recently. Most were cooked.
BTW, I'm on a kick lately regarding overloaded small conductors because I've run into many of them recently. Most were cooked.
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kingpb
Senior Member
- Location
- SE USA as far as you can go
- Occupation
- Engineer, Registered
BTW, I'm on a kick lately regarding overloaded small conductors because I've run into many of them recently. Most were cooked.
Probably because people like to use the minimum requirements for safety, i.e. NEC, as a design guide. GC's want the minimum because it keeps the price down, however end user's want a good, practical design that has some flexibility. Unfortunately those two ends rarely meet.
At the same time, if this is the same project you mentioned in the earlier post re: Christmas lighting, I am wondering if you're the one who will be installing the Christmas lights? If so, you would be able to supervise the load distribution. If not, would it make sense to undersize the breakers to more closely approximate the derated ampacity of the conductors?
BTW, I'm on a kick lately regarding overloaded small conductors because I've run into many of them recently. Most were cooked.
How's about keep 20A/1P breakers and use #8 wire for derating purpose sound?
Cow
Senior Member
- Location
- Eastern Oregon
- Occupation
- Electrician
I don't understand why anyone stuffs so many wires into one conduit either?
1. You get into huge wire with derating. It's not cost effective.
1a. The larger wire may not fit the terminals of the breaker.
2. Two or three 1" conduits are just as easy(if not easier) to run than one 2".
3. If the wires go bad underground, you have the potential to blow up 20 circuits in one pipe instead of just 7-10 circuits if they were spread across 2-3 conduits.
I bet 99% of the time I shoot for 9ccc's or less.
1. You get into huge wire with derating. It's not cost effective.
1a. The larger wire may not fit the terminals of the breaker.
2. Two or three 1" conduits are just as easy(if not easier) to run than one 2".
3. If the wires go bad underground, you have the potential to blow up 20 circuits in one pipe instead of just 7-10 circuits if they were spread across 2-3 conduits.
I bet 99% of the time I shoot for 9ccc's or less.
iMuse97
Senior Member
- Location
- Chicagoland
Not bad, actually. Cow's idea is a good one also. If this Christmas light install is like some I've done for commercial purposes (or for a light-crazy homeowner), I might run 10AWG to the J-Box and call it good. Otherwise, run 4 1" pipes/PVC conduits.
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